基于小波分析的电缆–架空线混合输电线路行波故障测距方法 - 电网技术.pdf

30 卷 9 期 电 网 技 术 Vol. 30 No. 9 2006 年5 月 Power System Technology May 2006 文章编号：1000-3673 （2006 ）09-0092-06 中图分类号：TM711 文献标识码：A 学科代码：4704051 基于小波分析的电缆 架空线混合输电线路 行波故障测距方法 骏，范春菊 （上海交通大学 电气工程系，上海市 闵行区 200240 ） Wavelet Analysis Based Traveling Wave Fault Location for Hybrid Transmission Line Consisting of Power Cable and Overhead Line LI Jun ，FAN Chun-ju （Department of Electrical Engineering，Shanghai Jiaotong University，Minhang District，Shanghai 200240，China ） ABSTRACT: According to the feature that traveling wave signal 的故障测距。采用ATP/Matlab 的仿真结果表明，该方法可 abruptly changes at the junction point of hybrid transmission line 对混合线路上任意点的短路故障进行测距，也可对断线故障 consisting of power cable and overhead line, a wavelet analysis 进行精确的测距。基于小波分析的方法可准确识别反射脉 based traveling wave fault location method for the hybrid 冲，减小电缆线路分支和近区故障反射波对测量精度的影 transmission line is proposed. Inj ecting impulse current at the 响，测距精度高。 terminal of power cable into the hybrid transmission line to be 关键词：电力电缆；架空线；故障测距；小波分析；电力系统 detected and conducting multi-resolution analysis of inj ected sampling signal by wavelet analysis, the position of modular 0 引言 maximum point of sampling signal is obtained. The position 电力电缆在输送电能的过程中会发生各种各 of traveling wave s reflection point in non-faulty phase is [1-2]